Input: synaptics - export model bits

Encode synaptics model in psmouse->model so it will be
exported via sysfs as input_dev->id.version and become
visible for applications.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index e42a0a4345ac..c77788bf932d 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -655,6 +655,16 @@ int synaptics_init(struct psmouse *psmouse)
 
         set_input_params(psmouse->dev, priv);
 
+        /*
+         * Encode touchpad model so that it can be used to set
+         * input device->id.version and be visible to userspace.
+         * Because version is __u16 we have to drop something.
+         * Hardware info bits seem to be good candidates as they
+         * are documented to be for Synaptics corp. internal use.
+         */
+        psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
+                          (priv->model_id & 0x000000ff);
+
         psmouse->protocol_handler = synaptics_process_byte;
         psmouse->set_rate = synaptics_set_rate;
         psmouse->disconnect = synaptics_disconnect;